The hagfish is a unique, jawless fish known for its slimy appearance and eel-like body. It typically inhabits deep ocean waters and is often found scavenging on dead or dying marine animals. Hagfish have a remarkable ability to produce large amounts of mucus, which helps them evade predators. These creatures possess a simple anatomy, lacking a backbone, and have a cartilaginous skeleton. Hagfish are also known for their ability to tie themselves into knots, which aids in removing excess slime and gaining leverage while feeding. Their unusual characteristics make them a fascinating subject of study in marine biology.